UPSR108 Datasheet | Unisonic Technologies

UNISONIC TECHNOLOGIES CO., LTD Preliminary HIGH PRECISION CC/CV PRIMARY-SIDE PWM CONTROLLER WITH FAST DYNAMIC RESPONSE - DESCRIPTION The UTC UPSR108 is a primary controller mode charger and adapter applications. The controlled variable is transferred by an auxiliary winding from the secondary to the primary side. The device integrates PWM controller to enhance the performance of Quasi Resonant (QR) mode flyback converters. The UTC UPSR108 operates in primary-side sensing and regulation. Opto-coupler and TL431 could be eliminated. It also provides off-time modulation to linearly decrease PWM frequency under light-load conditions so that low standby power can be achieved. The UTC...